SOLUTION: How do i write a function rule for buying 3.5 pounds of bananas at the cost of $.39 a pound?

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Question 32167: How do i write a function rule for buying 3.5 pounds of bananas at the cost of $.39 a pound?
Answer by stanbon(48535) About Me  (Show Source):
You can put this solution on YOUR website!
Let "x" be the number of pounds bought.
Then f(x)=0.39x
f(3.5)= 0.39(3.5)= $1.37
Cheers,
Stan H.